[1] West Glasgow Ambulatory Care Hosp NHS Greater Glas, Dept Dermatol, Glasgow, Scotland
[2] Univ Hosp Birmingham NHS Trust, Solihull Hosp, Dept Dermatol, Birmingham, England
[3] Univ Hosp Birmingham NHS Trust, Queen Elizabeth Hosp, Dept Dermatol, Birmingham, England
[4] Dept Dermatol, Belfast Hlth & Social Care Trust, Belfast, North Ireland
[5] Brighton & Sussex Univ Hosp NHS Trust, Dept Dermatol, Brighton, England
[6] Great Ormond St Hosp Sick Children, Dept Dermatol, London, England
[7] Univ Nottingham, Ctr Evidence Based Dermatol, Sch Med, Nottingham, England